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Title: Resistivity, Giant Magnetoresistance And Thermopower In La0.7Sr0.3Mno3 Showing A Large Difference In Temperatures Corresponding To The Ferromagnetic Transition And The Insulator-Metal Transition
Authors: Mahendiran, R
Mahesh, R
Raychaudhuri, A K
Rao, C N R
Keywords: giant magnetoresistance
perovskite oxides
Issue Date: Jul-1996
Publisher: Pergamon-Elsevier Science Ltd
Citation: Solid Sate Communications 99(3), 149-152 (1996)
Abstract: La0.7Sr0.3MnO3 samples prepared by heating the precursor gel at different temperatures in the 873 – 1473 K range show nearly the same ferromagnetic transition temperature (Tc ≈ 392±4 K), but the insulator-metal like transition temperatures (Tp) are significantly lower (≈ 170 K) than the corresponding Tcs in the samples annealed at lower temperatures (873 K and 1073 K). Magnetoresistance shows a peak only in the sample where Tp ≈ Tc. Thermopower (S) is large and negative for the samples annealed at lower temperatures, but it is low, exhibiting a change of sign with temperature for the sample annealed at 1473 K.
Description: Restricted Access
Other Identifiers: 0038-1098
Appears in Collections:Research Papers (Prof. C.N.R. Rao)

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